Question: What is the alkane with the safety classification and labelling of NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response and which has the word "propane" in its name?
Paraphrase: What is the alkane with the safety classification and labelling of NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response and which has the phrase "propane" in its name?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q41581 . ?sbj wdt:P4952 wd:Q51139288 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'propane')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: propane, propane